/* ==========================================================================
   Base Styles & Variables (Tasty PTE Coach)
   ========================================================================== */

   :root {
    /* Color Palette - Premium & Modern */
    --primary: #4F46E5; /* Indigo */
    --primary-light: #E0E7FF;
    --primary-dark: #3730A3;
    
    --accent-1: #EC4899; /* Pink/Rose for Writing */
    --accent-1-light: #FCE7F3;
    
    --success: #10B981; /* Emerald for Reading */
    --success-light: #D1FAE5;
    
    --accent-2: #F59E0B; /* Amber for Listening */
    --accent-2-light: #FEF3C7;

    /* Backgrounds & Text (Sleek Light Mode) */
    --bg-main: #FAFAFA;
    --bg-subtle: #F3F4F6;
    --bg-card: #FFFFFF;
    
    --text-main: #111827; /* Near Black */
    --text-muted: #4B5563; /* Gray */
    --text-light: #9CA3AF;

    /* Typography */
    --font-main: 'Outfit', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;

    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --shadow-primary: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Basic Setup */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-main);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.text-p-light {
    color: var(--text-muted);
}

.text-success { color: var(--success); }
.text-primary { color: var(--primary); }
.text-accent-1 { color: var(--accent-1); }
.text-white { color: #ffffff; }

.bg-primary { background-color: var(--primary); }
.bg-primary-light { background-color: var(--primary-light); }
.bg-accent-1 { background-color: var(--accent-1); }
.bg-accent-1-light { background-color: var(--accent-1-light); }
.bg-success { background-color: var(--success); }
.bg-success-light { background-color: var(--success-light); }
.bg-accent-2 { background-color: var(--accent-2); }
.bg-subtle { background-color: var(--bg-subtle); }
.bg-white { background-color: #ffffff; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-xl { margin-top: var(--space-xl); }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section-spacing {
    padding: var(--space-xl) 0;
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 15px 20px -3px rgba(79, 70, 229, 0.4);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary-light);
}

.btn-outline-white {
    background-color: transparent;
    border: 2px solid white;
    color: white;
}
.btn-outline-white:hover {
    background-color: rgba(255,255,255,0.1);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    background-color: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.link-with-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary);
}
.link-with-icon:hover {
    gap: 0.75rem;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    background-color: transparent;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    z-index: 1001; /* Above mobile menu */
}

.nav-links {
    display: none;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: none;
    gap: 1rem;
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
    z-index: 1001;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base);
    z-index: 998;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-card);
    z-index: 999;
    transition: right var(--transition-base);
    padding: 5rem 2rem 2rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
}

.mobile-menu.active {
    right: 0;
}
.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.close-menu-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.mobile-link {
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: 1px solid var(--bg-subtle);
    padding-bottom: 0.5rem;
}

.mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}


/* ==========================================================================
   Layout Grids
   ========================================================================== */

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.grid-3-col {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .grid-2-col {
        grid-template-columns: repeat(2, 1fr);
        align-items: center;
    }
    
    .grid-3-col {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-links, .nav-actions {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: none;
    }
}

@media (min-width: 1024px) {
    .grid-3-col {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
    }
    
    .hero-container {
        gap: var(--space-xl);
    }
}


/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem; /* Account for navbar */
    position: relative;
    overflow: hidden;
}

/* Subtle background accent */
.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    opacity: 0.6;
    z-index: -1;
    border-radius: 50%;
}

.hero-title {
    font-size: clamp(1.8rem, 3.5vw, 3.2rem);
    letter-spacing: -0.5px;
    margin-bottom: var(--space-sm);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    max-width: 90%;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Hero Visuals (Mockup styling) */
.hero-visual {
    position: relative;
    height: 500px;
    display: none; /* Hidden on mobile */
}

@media (min-width: 768px) {
    .hero-visual { display: block; }
}

.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
}

.main-hero-card {
    position: absolute;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    width: 320px;
    z-index: 2;
}

.floating-card {
    position: absolute;
    bottom: 10%;
    left: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-full);
    z-index: 3;
    animation: float 4s ease-in-out infinite;
}

.floating-card i {
    font-size: 2rem;
    color: var(--success);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.bg-gradient-1 { background: linear-gradient(135deg, #FDBA74, #F97316); }

.status {
    font-size: 0.75rem;
    background: var(--bg-subtle);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
}

.progress-section {
    margin-bottom: 1rem;
}

.progress-bar-container {
    height: 8px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-full);
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}


/* ==========================================================================
   Sections (Features, Courses)
   ========================================================================== */

.section-header {
    margin-bottom: var(--space-lg);
}

.section-title {
    font-size: clamp(2rem, 3vw, 3rem);
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.interactive-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid rgba(0,0,0,0.05);
}

.interactive-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

/* Course Cards */
.course-card {
    padding: 0;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.course-image {
    height: 200px;
    position: relative;
    background-color: var(--bg-subtle); /* Fallback */
    /* Placeholder gradients representing different modules */
}

.speaking-bg { background: linear-gradient(135deg, #c7d2fe, #a5b4fc); }
.writing-bg { background: linear-gradient(135deg, #fbcfe8, #f9a8d4); }
.reading-bg { background: linear-gradient(135deg, #6ee7b7, #34d399); }
.listening-bg { background: linear-gradient(135deg, #fde68a, #fcd34d); }

.overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.4));
}

.module-tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255,255,255,0.9);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 1;
}

.course-content {
    padding: 2.5rem 2rem 2rem;
    position: relative;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.absolute-icon {
    position: absolute;
    top: -28px;
    right: 2rem;
    box-shadow: var(--shadow-md);
}

.feature-list {
    margin: 1.5rem 0;
    flex-grow: 1;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--bg-subtle);
    padding-top: 1rem;
    margin-top: 1rem;
}

.duration {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.group-hover-btn {
    opacity: 0.7;
    transition: var(--transition-fast);
}

.group:hover .group-hover-btn {
    opacity: 1;
    background-color: var(--primary);
    color: white;
}

/* List Style Courses */
.course-list-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.course-list-item {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.course-list-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.course-header-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.course-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.course-checkmark {
    font-size: 2rem;
    color: var(--success);
    background: var(--success-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.course-price-badge {
    background-color: var(--bg-subtle);
    color: var(--text-main);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
}

.star-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--accent-2-light);
    color: var(--accent-2);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 700;
}

.course-description-list {
    margin-left: 3rem;
    color: var(--text-muted);
}

.course-description-list li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1rem;
}

.course-description-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.trial-cta-container {
    margin-left: 3rem;
    margin-top: 1rem;
}

/* Testimonial Placeholder (until image slider is ready) */
.testimonial-slider-placeholder {
    max-width: 700px;
    margin: 0 auto;
}

.testimonial-placeholder-inner {
    background: linear-gradient(135deg, var(--bg-subtle), #EEF2FF);
    border: 2px dashed var(--primary-light);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Naver Blog Review Cards */
.review-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.review-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.review-image-wrapper {
    position: relative;
    height: 180px;
    width: 100%;
    overflow: hidden;
    background-color: var(--bg-subtle);
}

.review-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.review-card:hover .review-image {
    transform: scale(1.05);
}

.review-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.review-date-badge {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.review-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.review-title {
    font-size: 1.1rem;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.review-snippet {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.review-read-more {
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-box {
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin: 0 auto;
}

.cta-box h2 {
    color: white;
    font-size: clamp(2rem, 3vw, 2.5rem);
}

.cta-box p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-decoration {
    position: absolute;
    right: -10%;
    bottom: -20%;
    font-size: 20rem;
    color: rgba(255,255,255,0.05);
    transform: rotate(-15deg);
    z-index: 1;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background-color: var(--text-main);
    color: white;
    padding-top: var(--space-xl);
}

.grid-footer {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
    .grid-footer {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

.footer h4 {
    color: white;
    font-size: 1.1rem;
}

.footer ul li {
    margin-bottom: 0.75rem;
}

.footer ul li a {
    color: var(--text-light);
}

.footer ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.social-icon:hover {
    background-color: var(--primary);
}

.input-light {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    color: white;
    font-family: inherit;
}
.input-light:focus {
    outline: none;
    border-color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.legal-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}
.legal-links a { color: var(--text-light); }
.legal-links a:hover { color: white; }


/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0); }
}

/* Scroll Animations Utilities */
.animate-fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.is-visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    transform: translateX(0) !important;
}

/* Specific Delay Utilities for Hero */
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.3s; }
.fade-in-delay-3 { transition-delay: 0.5s; }
.fade-in-delay-4 { transition-delay: 0.7s; }

/* Staggered items */
.staggered-fade > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.staggered-fade.is-visible > * {
    opacity: 1;
    transform: translateY(0);
}
.staggered-fade.is-visible > *:nth-child(1) { transition-delay: 0.1s; }
.staggered-fade.is-visible > *:nth-child(2) { transition-delay: 0.2s; }
.staggered-fade.is-visible > *:nth-child(3) { transition-delay: 0.3s; }
.staggered-fade.is-visible > *:nth-child(4) { transition-delay: 0.4s; }